Extension table



1. BQGGINGER. EXTENSION TABLE.

APPLlcAnoN 'man rsa. n, 1920. y

Patented Apr. 25, 1922.

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J. noeelNsEn.

EXTENSION TABLE,

l 2 n 92 1T E 5.5M. 2A. E, MLM di. nw m a. D.. nw 2 9 E. H D E N o n A c m P A 0 3. l 4. 1l- A1 1 Hilmsill' To all whom t ma?! concer/n:

Be it known that I, JOHN ROGGINGER, citizen ofthe United Statesyresiding at Chicago, in the-county'of Cook and State of 5 sion top tables.

Illinois, have inventedcertain new and use- 1 ful Improvements in Extension Tables; and

I do hereby declare the following to .be a full,`clear, iand exactv description of the invention-,such as willV enable others skilled in the artto which Iit appertains tofmake and useV the same.

f My invention relates to .tables and hasA special referenceto improvements in exteninvention is to provide The object of m Xed pedestal, with a top.

a table, having a adapted to be 'adjusted todiierent dimensions and a simple, strongand easily oper able locking device for holding the'top firmly locked in its adjusted' position.V

My invention consists in an'extension top table, provided with a uniqueV locking device whichis capableof locking the Vparts of the top together in the several positions thereof.

My invention also consists in a locking device .for extensionY `top tables comprising means'for operativelyjoining the -two main partsl of the top for equal out andin moveY` Y ment, 4and a'yielding lever mechanism for section on the line 3 3 ofFig. 2;

Fig. 4 is a partial sectional view through-l forcibly 1 drawing the two 4parts toward each other .and holding them against separation. My invention also consists in theseveral features ofconstruction and 1n the combinations and arrangements of parts and devices iby means of which I am enabled to attain the above-mentioned and other objects, and all as hereinafter describedand particularly pointed out inthe appended claims.

My .invention will be more readily understood by reference to the accompanying drawings forming partgof this specification and in.whicl`1'v 1,

Fig. l isa top plan `view of a table embodying lmy invention, the table top being shown? in dotted lines only, and in .closedA position; v

Fig. 2 is a fragmentarytop Vplan view' of the table shown in partly extended position f in full lines and in its fully extended posi- Vtionpin dotted lines; I

-Fig V3-is a central vertical" longltudinal the right hand-portion of Fig.f2,` taken on a horizontal line slightly above the sectional EXTENSION TABLE Specification of Letters Patent.

.in the path lever.

n JOHN- ROGGIINGERQOF CHIGAGoyILL'INoIKs.

Patented Apnea, 192e! Application med February 11., 1920. serial, No. 357,930.7- t I line 2%;3 and lookingl in theopposite direcion. Fig. 5 isa horizontal section on'the line 5-f5 of'Fig.\4i; r Figs. 6 vandare detail vertical sections on the lines l6&6 and 7-7 respectively fof In said drawings I have shown a fixed or rigid pedestal Il, formin" theA support-for the table and having' a at vupper end 2 Yupon which the guiderrails 3 are Xed. The

table top consists ofv two end members 4 and 5 whichare mounted -to slide back andv forth on theV guide rails Sbyimeans of longitudinal parallel guides 6 fixed to the undersideof said top members. The guide rails Y not only serve to guide the parts of the top in their back and 'forth movement, but, as lusual, also vserve toy hold the two parts iny the same plane, and to support the additional table boards, which are 'commonlykused to `fill in lbetween the two end members' when the top is extended. When the two parts V4L and 50i thetable top are placedl to form a top of the shortest length, their inner edges contact on a translV verse center line asshown in Fig-1,5 and from this position they can Vbe separated to the largest dimension 'oftop as shownin dotted lines in Fig. 2.

of the topto move cutand in the same dis-k tance so that the table; topv willrv always kbe' central over the pedestal I provideahori zontal swinging arm or lever-7p pivotally mounted ratits center on a verticalpivot 8 at the center of thepedestal to swing over this swinging lever to the underside of the two end-members 4 and 5 of thetop by links 9 and 10v respectively,'which are pivotally securedl to respective members at their re? spective ends so that fas one member of the table top is movedout or inl the-other mem-i" p ber moves likewise `and in unison theres "the pedestal. Il connect the outerv ends lofi fob",

with. Toj limit the :outward movement ofv the two members of the top I providev a stop l' ,y

,'11 fixed upon the upper end Vof the pedestal-l By'tkng yhold of one. of them-table parts it and the opposite `m`e`mber can be f readily moved out or in to adjust the top'to any desired length. If the desired length.` is the smallest dimension, the two parts 4:6

oi! one endof 'the swinging 1 105 Forfthepurposeof causing the "two 'parts' Y Yi and 5 are brought togetheruntil their-inner edges Vcontact above the center of the pedestal, and if it is desired to make the tabletop longer than the minimum length, the two Y 5 parts 4 and 5 are separated sufficiently to ad l mit one or more extra or intermediate table boards between the inner edges of the two parts 4 and '5 and then the two parts 4 and one of the table toprneinbers as 5, the teeth` 131thereof projecting "downwardly, and a stop member 14 mounted uponthe upper end fof-the pedestat adapted to be' engagedrby saidteeth.

The rack 12 is slightlylonger 'than the:

total'movem'ent of the member 5, by which 30 be vengaged-.by one of theteeth otthe rack regardless of the relative position of' the member 5 and the'pedestal.

but'may be moved` aslight distance by the engaging mechanism to tightly close the top and hold the several parts against separa- 40 tion.

' I mount the rack so that rit has a slight vertical movement.

are -ree ofthe stop and the fracliwith the tabletop parts can be freely moved back and fortln'and when the yrack is in its lower position, as shown in full lines, the stop is against movement. Y Y

F or mounting the: rack 'for movement as described, I secure a longitudinal guide Ibai' *15" to the lower face of the member 5, hav- 'curing it in place by .screws 18,-a'nda dependflan'ge 17 lagainst which the rack is positioned. I provide offset or cam-guide slots 19 inthe guide biarf15 spaced longitudinallyv Y Vtherein'and adapted to receive rigid guide pins or lugs 2 0 carried by the rack bar. .The rack isI held agai-nstremoval by'washersQl and heads A22:.formed onthe guide Ypins. Y

The 'two guide slots19l are exactly"simi-Y lai', and each hasan elongated lower horizon# tal part 19,', afshorter :horizontal partn19"l .and lower parts. .equallyrwith thespacing oi the two guide vslots andcnseq'uently as the rack bar is- 5 are pushed toward each otherto" contact:v

vone' direction 'by strilinglthefunderside of itis carried, and: it is so related to the stop member: 14 that said member 14 can always lVhen the rack' is engagedwith the stop 141 the'table top members are not tree'to move,

A To engage and disengage thejrack and stop f I Inv its upper position, 'as shown in dotted lines in Fig. 4, the teethV engagedby the raclrand fthe rack is held ing horizontally ertending'langes 16` for and an inclined 194'" upper The pins 20 are. spaced Y moved back andy forth relatively to the guide bar the pins, by reason of their.movement in said .guideslots cause the raclrtobe` main-y tained in parallel relation to the table top 'L and tofb'e. moved up' and down tothe vextent of the verticaldistance between the Lipper and lower Vparts or' said guide slots. V'F or the purpose of conveniently controlling themovement of said vrack bar, I proy vide a-*hand Alever or latch 23l pivotallyr'nount-` ed atone end to swing longitudinally rela?l tively to the rack bar, on the rear orouter' endof said guide bar-'15 by' a pivot24.r The Llever 23 is adaptedto swing back andzforth beneath the table top. and to vbe limited in' said top. Between the ends ofthevleverf'I Y sec-ureone endofa tension spring k25 Vby"A 'af rivet'26; andi-.I see'ur'etheotherl end of the spring to the rear end of the Lrackgbar 12 byf a rivet-27 and consequently, by swinging theV 902 lever baclr'and'up against the: table top" the rackf is Lpullecloa'clror outward in accordance: vwith thestrength of the spring 23:-

pre-A fer touse a coiled 'spring' andCI form it so' that 'when the springis not runder tensioni 96: the coils thereof.-areifinY yclosefcontact,Y in which conditionathe spring serves -as a link to push the 'guide bai' 15 .forward-when ythe lever 23 isswung` forward@V As the lever -23 i is swung backandfforth the rack bar'i'sgiiot 1400 only moved relatively bachi-and forth, but' by reasonIoffthe-cam guide'slots 19 it isialso v:raisedl and -lowered as; described.-l .Thee first.

actionjoifthe lever 23 in movinglthe raclf 'from its upper 'position is to .drawit 'down 105 by reason of the inclined portions of thecam slots for engagement with thestop 14, and then -asfthe lever 23 is swung farther'th'ev rackVA` is drawn backward 0r',` in other'words, Vthe table top 'is forced inward,the1sto`p 14=atsuch-1r10 time holding the rack. against movement. 1I arrange the pivotal mounting of thelever'23f and the rivets l26y and which' secure'the" ends lof 'the' 'spring ,tof-'the' lever and. to the laCl,.in such a re'lation'that the rear end of; 11,15l

the spring passes centers with the 'othertwo pointsuvhen the lever reaches the rearward: Y limit of its mevement,fand theelever is'co'nsequentlyheld at'the rearward limit of its 4movement by 'thelspring andlla tension is 120 .Y maintained upon the spring and likewise the 1 table top :is held closedby the samespring tension through'the medium ofthe rack: I

I preferably make Vthe'A stop'- member 14*- 'V i, somewhat yielding, in a downward? direc-P125` tion, so gthat thefraok can ,be entered -Viiito proper engagement` therewith even thoughl thelowerendlof'a tooth inightfstriketheupf per edge of the-stop as theraek is lbeing low:

For thispurpose I-make the stop-14 of' Yper orV 4free end and secured at its lower end to the top of the pedestal. The rack is ada-pted to engage the lcross-bar 28 and in order to protect thestop against tooj great a'strain which might occur through van attempt-.to`

move the table top without lifting the rack, andfor the purpose of holding the cross-bar at a definite height ready to receive the rack, I provide a relatively rigid stop 29 havingY two parallel rearwardly inclinedA hook-like tongues 30 fitting within the stop 14 and` inclined over the cross-bar 28. The tongues 30 are separated laterally to provide a free space to receive the rack and to permit it to engage the cross-bar 28,as shown 1n Fig. 7.

The stop 14 is normally held by its own resilience against the underside of the fixed stop in position to be depressed, if atooth of the rack should contact with it as the rack is being lowered. Should this occur` the further movement of the'- lever 23, as eX- plained, would draw the rack back and the stop 14 would then spring up into the next vadjacent slot or space inthe rack and engage the next adjacent tooth. I provide sufiicient horizontal movement to the rack, once it is depressed, to insure the proper locking of the top even though the rack should first de-p press the stop 14, and furthermore, kprovide suflicient horizontal movement to the rear connection of the spring 25 to the lever and free the same from the stop 14, the two ends 4 and 5 are then separated to admit the necessary table boards between them, then the two ends are closedl upon the boards bringing all the parts substantially into contact, and the lever 23 is then raised, depressing the rack and engaging it with the stop 14, a further movement of the lever, serves to press the several parts of the top together with the pressure due to the tension of the spring 25, and the final movement looks the lever 23 in its locking position, as described.

I claim as my invention:

1. In an extension table having two opposed table top members mounted on a pedestal and linked together for equal out and in movement, a stop on said pedestal, a relatively longitudinally movable bar on one of said members having a seriesofv teeth adapted for engagement with said stopt members against separation."

melansconnecting saidileverwithpsaid bar for-moving .theibarr to' engage said` stop and for :forcing saidmemberstoward each other. "i

anfextensionltable top having-two members linked together for equal out and `in movement, a yielding projectionfadaptedftozbe mountedna'nd held stationary:y relativelyfto -rac'klbar carried j by one-ffofxsaid 'members adaptedrforV engagement with'ifsaid projec--f` tion-means carried by-sai'd member for mov# mg said rack bar vertically for engagingand disengaging said projection and 'for moving said rackI bark longitudinally to force said table top members toward each other.

3. In mechanism for locking theV vparts'of` an extension table top having two members se, i

linked together for equal out and in movement, layielding projection fixed relatively v to saidV members, a longitudinally arranged bar carried by one ofsaid members having,

teeth for engagement with said projection,

said bar also having guidevpins, a guide fixed on said member provided with forward and rear cam guide slots rece1v1ng`sa1d guide pins and adapted, as said bar is moved back.

and forth, to hold said bar horizontally and lower and raise .the bar, for engaging and vvdisengaging said projection, a hand lever pivotallymounted onsaid guide and a yielding Vlink connected at oneend to said lever between its ends and at its other end to the rear end of said bar and/adapted to yieldthe connectionof said link with said lever i i being adapted to pass centers with the pivot said lever-at one limit of its'movemen't.

V4. Mechanism for locking the opposedl members of an extension table top which arel connected for simultaneous out and in movement andvcomprising a. projection iXed in relation tosaid members, alongitudinally arranged bar carried by one of saidmembers adapted to'be engaged With said projection in any relative position of the member by which it is carried, means for disengaging said bar and projection to permit the free? out, and in movementfof said members and means engaging saidl bar with said projection and for moving the bar longitudinallyV relatively to the member carrying it forv forcing'said members toward each other, and

means for yieldingly locking said 'barrel-A j 105 upon which said lever is mounted for locking i usf 70 f2. In mechanism for locking` the partsfof members, a projection fixed in rrelation to said members adapted to be engaged by saidy rack bar in any relative position ofthe member carrying same, a guide by which the bar is carried, cam slots in the guide, pins carred by the bar and engaging. Within the slots for causing the bar to be `raised and loweredadjacent to one limit'of its movement -for engaging and disengaging said projection, means for moving the bar back and forth, vsaid projection being resilient and adapted to yield in, a direction Vaway from said bar to permit said up and down movement thereof and the engagement thereof with said projectlon. f

G. In rmechanism for looking thepartsfof an extension table top having two opposedy movable members, means for holding one of said members against 'movement `away from the other, and means for forcing said other member toward the held member compris' inga stop Yfixed relatively to said ^members,1 *a longitudinally arranged rack bar' carried JOHNVROGGINGERQ 

